Implantable prosthetic valves and methods relating to same

• US 8,876,897 B2
• Filed: 12/22/2008
• Issued: 11/04/2014
• Est. Priority Date: 12/20/2007
• Status: Expired due to Fees

• Current Assignee: Regents of the University of California (University of California)
• Original Assignee: Arash Kheradvar
• Inventors: Kheradvar, Arash
• Primary Examiner(s): Isabella, David
• Assistant Examiner(s): Woznicki, Jacqueline
• Application Number:
  US12/341,170
• Publication Number:
  US 20090164003A1
• Time in Patent Office: 2,143 Days
• Field of Search: 623 212- 219
• US Class Current: 623/2.36
• CPC Class Codes: A61F 2/2412 with soft flexible valve members, e.g. tissue valves shaped like natural valves check valves with flexible valve members in general F16K15/14
• CPC Class Codes: A61F 2/2442 Annuloplasty rings or inserts for correcting the valve shape; Implants for improving the function of a native heart valve
• CPC Class Codes: A61F 2/2445 Annuloplasty rings in direct contact with the valve annulus
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2230/0008 elliptical or oval
• CPC Class Codes: A61F 2230/0078 hyperboloidal
• CPC Class Codes: A61F 2230/0095 Saddle-shaped

Abstract

In accordance with one embodiment of the present disclosure, a prosthetic valve is provided. The prosthetic valve includes an annulus, a pair of leaflets, and a pair of support elements. The annulus has a generally saddle-shape formed by a movable pair of first portions separated from each other by a movable pair of second portions. The pair of leaflets extend from the annulus and are separated from each other by the pair of support elements. The first portions of the annulus and the second portions of the annulus are configured to move back and forth from being generally concave to being generally convex such that any movement of the first portions of the annulus occurs at generally the same time as any movement of the second portions of the annulus.

Claims

1. A prosthetic valve consisting of:

a saddle-shaped annulus, a pair of leaflets connected to the annulus, and a pair of support elements, each of the support elements connected to the leaflets, each of the leaflets separated from one another by each support element, the annulus adapted to move back and forth from a generally concave state to a generally convex state, the pair of leaflets adapted to define an opening when the annulus is in the generally concave state and to define a seal when the annulus is in the generally convex state;

wherein when the valve is implanted in a mitral position, pressure change between diastole and systole cause a geometrical change resulting in opening and closure of the valve leaflets, respectively, with annulus deflection.

2. The prosthetic valve of claim 1, wherein the annulus and the pair of support elements comprise a shape memory material.

3. The prosthetic valve of claim 2, wherein the shape memory material comprises a nickel titanium alloy.

4. The prosthetic valve of claim 1, wherein the pair of leaflets comprise synthetic material, engineered biological tissue, biological valvular leaflet tissue, pericardial tissue, cross-linked pericardial tissue, or combinations thereof.

5. The prosthetic valve of claim 4, wherein the pair of leaflets comprise pericardial tissue selected from the group consisting of bovine, equine, porcine, ovine, human tissue, or combinations thereof.

6. The prosthetic valve of claim 4, wherein the material or tissue comprises a compliant membrane of a single sheet or a compound manifold.

7. The prosthetic valve of claim 1, wherein the support elements are curved away from one another when the pair of leaflets define the seal.

8. The prosthetic valve of claim 1, wherein the support elements are curved towards one another when the pair of leaflets define the opening.